304 



PROCEEDINGS OF THE NATIONAL MUSEUM. 



VOL. XXXIII. 



De Selys: Abdomen 35-37 mm.; hind wing 30-31 mm.; antenodals, 

 front wing 12-13 mm.; hind wing 9-10 mm.; postnodals, front and 

 hind wings 6-10 mm. Sutures of the face without black, vertex 

 without a central j^ellow spot. Thorax above black, with small oval 

 or triangular isolated dorsal stripes and an antehumeral stripe yellow ; 



Fig. 30. —Wings of male Platygomphus dolabr.vtus. De Selys' collection. 



sides yellow, with a stripe on the second suture, this stripe forked 

 above a branch going to the base of each wing. Abdommal segments 

 3-6 with a basal yellow ring, prolonged on the sides; a small dorsal 

 median spot on 3 and 4; basal half of 7 yellow; 8 and 9 dilated, the 

 sides largely yellow; 10 light brown. 



Fig. 31.— Wings of female Platygomphus dolabr.*.tus. De Selys' collection. 

 Genus GOMPHUS Leach. 



As at present understood but two oriental species are certainly 

 referable to this genus. For a discussion of G. vermiculatus Martin 

 see Burmagomplius; for G. kelantanensis Laidlaw see Leptogom- 



